[1] He served his country in World War II with the Kriegsmarine, subsequently joining the post-war British-led German Mine Sweeping Administration.
As the Australian National Maritime Museum, Sydney, asserts, the ‘replica of James Cook’s HMB Endeavour’, which began in 1988 in Fremantle, Western Australia, ‘is one of the world’s most accurate maritime reproductions.’[4] Marquardt's expertise was utilised in the construction of the replica, a subject he reprised in his book Captain Cook’s Endeavour (1995) as part of Conway's Anatomy of the Ship series.
A highly skilled draughtsman, Marquardt provided the drawings for Brian Lavery and Geoff Hunt's The Frigate Surprise: The Design, Construction and Careers of Jack Aubrey’s Favourite Command (2008), which examines the real historic ship behind the Patrick O’Brian novels.
In 1987 and 1989 Marquardt was commissioned by the Reserve Bank of Australia to produce maritime drawings for the commemorative $10 and the current $20 notes.
[3] Marquardt was a fellow of the Australian Society of Marine Artists and was made an Honorary Member of the Russian Guild of Ship Modellers for ‘his outstanding contributions to international ship modelling.’[2] Marquardt had a dedicated website created by Kay Wunder,[5] where many of his articles can be read.